Ink cartridge



FIG. 1 is a top, front, and right side perspective view of the ink cartridge embodying our new design;

FIG. 2 is a bottom, rear and right side perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a front view thereof. 

The ornamental design for an ink cartridge, as shown and described. 